LIVINGSTON, N.J. & MELVILLE, N.Y.--(BUSINESS WIRE)--Milestone Scientific, Inc. (OTCBB:MLSS), the recognized leader in advanced injection technologies and Henry Schein, Inc. (Nasdaq:HSIC), the largest provider of healthcare products and services to office-based practitioners in the combined North American and European markets, today announced that the companies have signed a distribution agreement granting Henry Schein exclusive distribution rights to market Milestone’s Single Tooth Anesthesia (STA™) system and other products to dental professionals in the United States and Canada.